Hi there and welcome
Don't worry about ANY subject you wish to discuss here. This is the wonderful thing about Powersurge. We discuss anything and everything.

You are most certainly not a freak!
I had itchiness like yours a few years ago during peri. It was so bad I went to the doctor. It was on the pubic area but not right down between my legs so much.
The doctor examined me and said my skin was aging-haha-which was probably causing the irritation.
She gave me some cortisone cream which did absolutely nothing!
I have a friend who is a midwife and we were discussing it (as you do). She asked me if I was using talc and if so which sort. At the time I was using Johnsons baby powder-I had used it forever.
She said that at the hospital they had advised the mothers to stop using it on their new babies and had taken it out of the gift packs as the formulation had changed and a lot of babies were getting rashes. So I stopped using it and hey-presto the itching stopped!
There are so many things that could cause it-like the laundry powder you use, or talc if you use it?
Failing that it could just be what my doctor told me mine was-aging skin.
Could you try changing things one at a time and see if anything makes a difference?
By the way I get an itchy scalp too and sometimes if flares up and I get little spots. Apparently this is caused by a yeast Pityrosporum-and I treat it with a special Ketoconazole shampoo. It works a treat on my scalp but I don't know if you could use it on the pubic area
I would doubt it as it is very strong but maybe the doctor could prescribe something with Ketoconazole which you could use in that area? Hope you find a solution.
As for the formication. I had that for a while after my surgical menopause. In my experience it is a very different feeling from itching. It feels like something crawling under your skin. I found it was more generalised-all over the body and not an itchy feeling-quite different.
Hope that helps
janet c